// Copyright 2015 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef NET_PROXY_PROXY_RESOLVER_V8_TRACING_WRAPPER_H_
#define NET_PROXY_PROXY_RESOLVER_V8_TRACING_WRAPPER_H_

#include <memory>

#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "net/base/net_export.h"
#include "net/proxy/proxy_resolver.h"
#include "net/proxy/proxy_resolver_factory.h"
#include "net/proxy/proxy_resolver_v8_tracing.h"

namespace net {

class HostResolver;
class NetLog;
class ProxyResolverErrorObserver;

// A wrapper for ProxyResolverV8TracingFactory that implements the
// ProxyResolverFactory interface.
class NET_EXPORT ProxyResolverFactoryV8TracingWrapper
    : public ProxyResolverFactory {
public:
    // Note that |host_resolver| and |net_log| are expected to outlive |this| and
    // any ProxyResolver instances created using |this|. |error_observer_factory|
    // will be invoked once per CreateProxyResolver() call to create a
    // ProxyResolverErrorObserver to be used by the ProxyResolver instance
    // returned by that call.
    ProxyResolverFactoryV8TracingWrapper(
        HostResolver* host_resolver,
        NetLog* net_log,
        const base::Callback<std::unique_ptr<ProxyResolverErrorObserver>()>&
            error_observer_factory);
    ~ProxyResolverFactoryV8TracingWrapper() override;

    // ProxyResolverFactory override.
    int CreateProxyResolver(
        const scoped_refptr<ProxyResolverScriptData>& pac_script,
        std::unique_ptr<ProxyResolver>* resolver,
        const CompletionCallback& callback,
        std::unique_ptr<Request>* request) override;

private:
    void OnProxyResolverCreated(
        std::unique_ptr<std::unique_ptr<ProxyResolverV8Tracing>> v8_resolver,
        std::unique_ptr<ProxyResolver>* resolver,
        const CompletionCallback& callback,
        std::unique_ptr<ProxyResolverErrorObserver> error_observer,
        int error);

    std::unique_ptr<ProxyResolverV8TracingFactory> factory_impl_;
    HostResolver* const host_resolver_;
    NetLog* const net_log_;
    const base::Callback<std::unique_ptr<ProxyResolverErrorObserver>()>
        error_observer_factory_;

    DISALLOW_COPY_AND_ASSIGN(ProxyResolverFactoryV8TracingWrapper);
};

} // namespace net

#endif // NET_PROXY_PROXY_RESOLVER_V8_TRACING_WRAPPER_H_
